Update release notes.
Update release notes.

ahachete/gpdb,0x0FFF/gpdb,50wu/gpdb,techdragon/Postgres-XL,pavanvd/postgres-xl,lisakowen/gpdb,kaknikhil/gpdb,Chibin/gpdb,snaga/postgres-xl,postmind-net/postgres-xl,kaknikhil/gpdb,rubikloud/gpdb,Quikling/gpdb,Chibin/gpdb,Postgres-XL/Postgres-XL,kaknikhil/gpdb,atris/gpdb,ashwinstar/gpdb,foyzur/gpdb,adam8157/gpdb,zeroae/postgres-xl,adam8157/gpdb,tpostgres-projects/tPostgres,chrishajas/gpdb,foyzur/gpdb,0x0FFF/gpdb,zaksoup/gpdb,ahachete/gpdb,royc1/gpdb,50wu/gpdb,randomtask1155/gpdb,royc1/gpdb,snaga/postgres-xl,edespino/gpdb,kaknikhil/gpdb,lisakowen/gpdb,postmind-net/postgres-xl,Quikling/gpdb,randomtask1155/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,oberstet/postgres-xl,adam8157/gpdb,lisakowen/gpdb,randomtask1155/gpdb,royc1/gpdb,Chibin/gpdb,janebeckman/gpdb,0x0FFF/gpdb,lintzc/gpdb,Quikling/gpdb,techdragon/Postgres-XL,kaknikhil/gpdb,zaksoup/gpdb,jmcatamney/gpdb,oberstet/postgres-xl,yuanzhao/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,edespino/gpdb,royc1/gpdb,rubikloud/gpdb,xuegang/gpdb,yuanzhao/gpdb,atris/gpdb,0x0FFF/gpdb,edespino/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,Chibin/gpdb,greenplum-db/gpdb,rvs/gpdb,arcivanov/postgres-xl,royc1/gpdb,xuegang/gpdb,chrishajas/gpdb,tangp3/gpdb,adam8157/gpdb,arcivanov/postgres-xl,janebeckman/gpdb,yazun/postgres-xl,0x0FFF/gpdb,lisakowen/gpdb,snaga/postgres-xl,50wu/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,royc1/gpdb,yazun/postgres-xl,pavanvd/postgres-xl,edespino/gpdb,lintzc/gpdb,rvs/gpdb,arcivanov/postgres-xl,zaksoup/gpdb,rvs/gpdb,greenplum-db/gpdb,CraigHarris/gpdb,rubikloud/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,rvs/gpdb,CraigHarris/gpdb,postmind-net/postgres-xl,ahachete/gpdb,lpetrov-pivotal/gpdb,lpetrov-pivotal/gpdb,CraigHarris/gpdb,janebeckman/gpdb,edespino/gpdb,foyzur/gpdb,chrishajas/gpdb,chrishajas/gpdb,techdragon/Postgres-XL,lintzc/gpdb,CraigHarris/gpdb,lisakowen/gpdb,rubikloud/gpdb,lintzc/gpdb,CraigHarris/gpdb,50wu/gpdb,adam8157/gpdb,snaga/postgres-xl,randomtask1155/gpdb,zeroae/postgres-xl,cjcjameson/gpdb,yazun/postgres-xl,arcivanov/postgres-xl,oberstet/postgres-xl,zeroae/postgres-xl,cjcjameson/gpdb,cjcjameson/gpdb,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,tangp3/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,janebeckman/gpdb,lintzc/gpdb,yazun/postgres-xl,chrishajas/gpdb,zeroae/postgres-xl,tpostgres-projects/tPostgres,lpetrov-pivotal/gpdb,adam8157/gpdb,tangp3/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,atris/gpdb,kaknikhil/gpdb,rubikloud/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,randomtask1155/gpdb,oberstet/postgres-xl,atris/gpdb,edespino/gpdb,chrishajas/gpdb,yuanzhao/gpdb,rvs/gpdb,lisakowen/gpdb,ashwinstar/gpdb,lintzc/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,ovr/postgres-xl,yuanzhao/gpdb,Chibin/gpdb,chrishajas/gpdb,randomtask1155/gpdb,ahachete/gpdb,techdragon/Postgres-XL,edespino/gpdb,ovr/postgres-xl,edespino/gpdb,janebeckman/gpdb,0x0FFF/gpdb,tangp3/gpdb,xinzweb/gpdb,kmjungersen/PostgresXL,adam8157/gpdb,arcivanov/postgres-xl,Quikling/gpdb,atris/gpdb,tpostgres-projects/tPostgres,kmjungersen/PostgresXL,edespino/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,jmcatamney/gpdb,tangp3/gpdb,janebeckman/gpdb,xuegang/gpdb,50wu/gpdb,oberstet/postgres-xl,zeroae/postgres-xl,zaksoup/gpdb,cjcjameson/gpdb,tangp3/gpdb,kmjungersen/PostgresXL,royc1/gpdb,randomtask1155/gpdb,rubikloud/gpdb,lpetrov-pivotal/gpdb,Chibin/gpdb,rvs/gpdb,xinzweb/gpdb,rubikloud/gpdb,lisakowen/gpdb,kmjungersen/PostgresXL,tangp3/gpdb,kaknikhil/gpdb,lintzc/gpdb,edespino/gpdb,royc1/gpdb,janebeckman/gpdb,tpostgres-projects/tPostgres,xinzweb/gpdb,jmcatamney/gpdb,zaksoup/gpdb,kaknikhil/gpdb,Postgres-XL/Postgres-XL,pavanvd/postgres-xl,rvs/gpdb,50wu/gpdb,ashwinstar/gpdb,snaga/postgres-xl,cjcjameson/gpdb,xuegang/gpdb,atris/gpdb,xinzweb/gpdb,rubikloud/gpdb,CraigHarris/gpdb,atris/gpdb,Quikling/gpdb,pavanvd/postgres-xl,xinzweb/gpdb,yuanzhao/gpdb,Chibin/gpdb,yazun/postgres-xl,janebeckman/gpdb,ahachete/gpdb,greenplum-db/gpdb,lintzc/gpdb,foyzur/gpdb,CraigHarris/gpdb,Chibin/gpdb,postmind-net/postgres-xl,cjcjameson/gpdb,jmcatamney/gpdb,zaksoup/gpdb,Postgres-XL/Postgres-XL,adam8157/gpdb,foyzur/gpdb,Quikling/gpdb,foyzur/gpdb,greenplum-db/gpdb,Quikling/gpdb,chrishajas/gpdb,ovr/postgres-xl,Quikling/gpdb,lintzc/gpdb,ahachete/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,Chibin/gpdb,xinzweb/gpdb,tangp3/gpdb,CraigHarris/gpdb,50wu/gpdb,techdragon/Postgres-XL,randomtask1155/gpdb,jmcatamney/gpdb,postmind-net/postgres-xl,zaksoup/gpdb,janebeckman/gpdb,ahachete/gpdb,Quikling/gpdb,ashwinstar/gpdb,arcivanov/postgres-xl,Quikling/gpdb,lpetrov-pivotal/gpdb,Chibin/gpdb,xinzweb/gpdb,rvs/gpdb,xinzweb/gpdb,greenplum-db/gpdb,xuegang/gpdb,kmjungersen/PostgresXL,xuegang/gpdb,janebeckman/gpdb,foyzur/gpdb,xuegang/gpdb,ovr/postgres-xl,yuanzhao/gpdb,zaksoup/gpdb,rvs/gpdb,greenplum-db/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,ahachete/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,ovr/postgres-xl,greenplum-db/gpdb,lpetrov-pivotal/gpdb,foyzur/gpdb,50wu/gpdb,lisakowen/gpdb,rvs/gpdb,atris/gpdb,tpostgres-projects/tPostgres